package com.company.section1;

import java.util.HashMap;

/**
 * @author cbf4Life cbf4life@126.com
 * I'm glad to share my knowledge with you all.
 */
public abstract class SymbolExpression extends Expression {
    protected Expression left;
    protected Expression right;

    //所有的解析公式都应只关心自己左右两个表达式的结果
    public SymbolExpression(Expression _left, Expression _right) {
        this.left = _left;
        this.right = _right;
    }


}
